Finding the Fourth Proportional to 19,449.30, 29,101.05 and 12,888.30

Step by Step Solution

1. Step 1: Write the proportion equation
   19,449.30 : 29,101.05 = 12,888.30 : x
2. Step 2: Convert to fraction form
   19,449.30/29,101.05 = 12,888.30/x
3. Step 3: Cross multiply
   19,449.30x = 29,101.05 × 12,888.30
4. Step 4: Simplify right side
   19,449.30x = 375,063,062.72
5. Step 5: Solve for x
   x = 375,063,062.72/19,449.30
6. Step 6: Final answer
   x = 19,284.14